Extract visibility and validation helpers in elements index

memory-bank/change-log.md

@@ -3555,3 +3555,33 @@ Validation:
 Follow-ups:
 
 - Continue Phase 2 with bounded renderer/module extractions from `components/elements/index.js` (one cohesive bundle per commit).
+
+---
+
+### CL-100: 22500 `components/elements/index.js` helper normalization (validation messages + visibility checks)
+
+date: 2026-04-07
+author: Cline
+scope: `components/elements/index.js`
+type: change
+rationale: Apply the requested next bounded refactor slice by consolidating repeated validation message setup and parent-field visibility logic into shared local helpers.
+impact: No intended behavior change; EN/CY and accessibility behavior preserved while reducing repeated logic and future drift risk.
+status: completed
+
+Summary:
+
+- Added `getValidationMessages(t)` helper for repeated `required/emoji/postcode` message retrieval.
+- Added visibility helpers:
+    - `hasParentFieldValue(...)`
+    - `isVisibleByEquality(...)`
+    - `isVisibleByInclusion(...)`
+- Replaced repeated inline visibility and validation-message setup across field wrappers with helper usage (Textfield, MultiLinefield, RichMultiLinefield, DateFieldPicker, YesNofield, Radiofield, NumericField, DecimalField).
+- Kept existing field render paths, conditions, and validation calls intact.
+
+Validation:
+
+- `npx eslint components/elements/index.js` -> pass
+
+Follow-ups:
+
+- Continue bounded no-behavior-change slices by removing dead locals/comments and extracting one additional low-risk field wrapper at a time.